U.S. patent application number 16/143670 was filed with the patent office on 2019-05-16 for printed circuit board, display panel, display device including the printed circuit board and the display panel, and method of ma.
The applicant listed for this patent is Samsung Display Co., Ltd.. Invention is credited to Kiseok CHA, Ickkyu JANG, Young-jin KIM, Yunmi KIM, Wonjong OHN.
Application Number | 20190150297 16/143670 |
Document ID | / |
Family ID | 66432655 |
Filed Date | 2019-05-16 |
United States Patent
Application |
20190150297 |
Kind Code |
A1 |
KIM; Young-jin ; et
al. |
May 16, 2019 |
PRINTED CIRCUIT BOARD, DISPLAY PANEL, DISPLAY DEVICE INCLUDING THE
PRINTED CIRCUIT BOARD AND THE DISPLAY PANEL, AND METHOD OF
MANUFACTURING THE DISPLAY DEVICE
Abstract
A display device includes a display panel that is curved in a
direction surrounding an imaginary bending axis and has a top
surface in which a plurality of panel bonding areas arranged in the
curved direction is defined, a printed circuit board that is curved
in the direction surrounding the bending axis and has a rear
surface in which a plurality of board bonding areas arranged in the
curved direction is defined, and a plurality of flexible circuit
boards, each of which includes one end disposed on a corresponding
one of the panel bonding areas so as to be connected to the display
panel, and another end disposed on a corresponding one of the board
bonding areas so as to be connected to the printed circuit
board.
Inventors: |
KIM; Young-jin; (Yongin-si,
KR) ; CHA; Kiseok; (Suwon-si, KR) ; JANG;
Ickkyu; (Yongin-si, KR) ; KIM; Yunmi;
(Yongin-si, KR) ; OHN; Wonjong; (Seongnam-si,
KR) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Samsung Display Co., Ltd. |
Yongin-si |
|
KR |
|
|
Family ID: |
66432655 |
Appl. No.: |
16/143670 |
Filed: |
September 27, 2018 |
Current U.S.
Class: |
345/30 |
Current CPC
Class: |
G09G 3/20 20130101; H05K
1/189 20130101; H05K 3/32 20130101; G09F 9/301 20130101; H05K 1/147
20130101; H05K 3/361 20130101; G09G 2380/02 20130101; H05K 1/028
20130101; H05K 2201/10128 20130101 |
International
Class: |
H05K 3/36 20060101
H05K003/36; G09F 9/30 20060101 G09F009/30; G09G 3/20 20060101
G09G003/20; H05K 1/18 20060101 H05K001/18; H05K 3/32 20060101
H05K003/32 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 16, 2017 |
KR |
10-2017-0153369 |
Claims
1. A display device comprising: a display panel that is curved in a
direction surrounding an imaginary bending axis and has a top
surface in which a plurality of panel bonding areas arranged in the
curved direction are defined; a printed circuit board that is
curved in the direction surrounding the bending axis and has a rear
surface in which a plurality of board bonding areas arranged in the
curved direction are defined; and a plurality of flexible circuit
boards, each of which includes: one end disposed on a corresponding
one of the panel bonding areas so as to be connected to the display
panel; and another end disposed on a corresponding one of the board
bonding areas so as to be connected to the printed circuit board,
wherein at least one flexible circuit board, disposed at an
outermost position, of the flexible circuit boards is defined as an
outermost flexible circuit board, and wherein the outermost
flexible circuit board is tilted at a predetermined angle with the
curved direction in such a way that the one end thereof is tilted
with respect to the curved direction to face an outside of the
display panel.
2. The display device of claim 1, wherein the printed circuit board
comprises: a first surface in which the board bonding areas are
defined; and a second surface opposite to the first surface,
wherein the printed circuit board is disposed under the display
panel, and wherein the second surface is closer to the display
panel than the first surface.
3. The display device of claim 2, wherein at least the outermost
flexible circuit board of the flexible circuit boards is tilted at
the predetermined angle with the curved direction in such a way
that the another end thereof is tilted with respect to the curved
direction to face an inside of the printed circuit board.
4. The display device of claim 3, wherein the flexible circuit
boards have the same shape and the same size.
5. The display device of claim 1, wherein wherein at least one
panel bonding area, disposed at an outermost position, of the panel
bonding areas is defined as an outermost panel bonding area, and
the display panel comprises: a plurality of first pad electrodes
disposed in each of other panel bonding areas of the panel bonding
areas except at least the outermost panel bonding area; and a
second pad electrode disposed in the outermost panel bonding area,
wherein an extending direction of the first pad electrodes makes
the predetermined angle with an extending direction of the second
pad electrode.
6. The display device of claim 1, wherein wherein at least one
board bonding area, disposed at an outermost position, of the board
bonding areas is defined as an outermost board bonding area, and
the printed circuit board comprises: a plurality of third pad
electrodes disposed in each of other board bonding areas of the
board bonding areas except the outermost board bonding area; and a
fourth pad electrode disposed in the outermost board bonding area,
wherein an extending direction of the third pad electrodes makes
the predetermined angle with an extending direction of the fourth
pad electrode.
7. The display device of claim 1, wherein a magnitude of the
predetermined angle is in inverse proportion to a distance between
the display panel and the bending axis.
8. The display device of claim 1, wherein the outermost flexible
circuit board is provided in plurality, and wherein the outermost
flexible circuit boards are disposed symmetrically with respect to
a central axis that is parallel to the bending axis and passes
through a center of the display device.
9. The display device of claim 8, wherein each of the flexible
circuit boards is tilted in such a way that the one end thereof is
tilted with respect to the curved direction of the display panel to
face the outside of the display panel and the another end thereof
is tilted with respect to the curved direction of the printed
circuit board to face the inside of the printed circuit board, and
wherein the angle at which each of the flexible circuit boards is
tilted in the order of being arranged in a direction from the
outermost flexible circuit board toward the central axis is
reduced.
10. A method of manufacturing a display device, the method
comprising: providing a display panel which has a flat plate shape
and in which a plurality of panel bonding areas arranged in one
direction is defined; providing a printed circuit board in which a
plurality of board bonding areas arranged in the one direction is
defined; connecting the display panel and the printed circuit board
with a plurality of flexible circuit boards; disposing the printed
circuit board under the display panel; and curving the display
panel and the printed circuit board to surround an imaginary
bending axis, wherein the connecting of the display panel and the
printed circuit board comprises: disposing one end of each of the
flexible circuit boards on a corresponding one of the panel bonding
areas; and disposing another end of each of the flexible circuit
boards on a corresponding one of the board bonding areas, wherein
at least two outermost flexible circuit boards of the flexible
circuit boards are disposed to be tilted at a predetermined angle
with the one direction in such a way that the one ends thereof are
tilted with respect to the one direction to face an outside of the
display panel and the other ends thereof are tilted with respect to
the one direction to face an inside of the printed circuit
board.
11. The method of claim 10, wherein areas of the panel bonding
areas, on which the one ends of the outermost flexible circuit
boards are disposed, are defined as outermost panel bonding areas,
wherein areas of the board bonding areas, on which the other ends
of the outermost flexible circuit boards are disposed, are defined
as outermost board bonding areas, and wherein, in the disposing of
the printed circuit board under the display panel, a distance
between each of the outermost panel bonding areas and a panel
bonding area adjacent thereto is equal to a distance between each
of the outermost board bonding areas and a board bonding area
adjacent thereto.
12. The method of claim 11, wherein the printed circuit board
includes: a first surface in which the board bonding areas are
defined; and a second surface opposite to the first surface,
wherein the disposing of the printed circuit board under the
display panel comprises: disposing the printed circuit board in
such a way that the second surface is closer to the display panel
than the first surface.
13. The method of claim 11, wherein the connecting of the display
panel and the printed circuit board comprises: disposing the
flexible circuit boards symmetrically with respect to a central
axis that is parallel to the bending axis and passes through a
center of the display device.
14. The method of claim 13, wherein the connecting of the display
panel and the printed circuit board further comprises: tilting the
flexible circuit boards in such a way that the one ends of the
flexible circuit boards are tilted to face the outside of the
display panel and the other ends of the flexible circuit boards are
tilted to face the inside of the printed circuit board, wherein
tilted angles of the flexible circuit boards sequentially decrease
in a direction toward the central axis.
15. A display device comprising: a display panel displaying an
image and including a pad area defined in one edge of the display
panel in a first direction, wherein the pad area includes a
plurality of panel bonding areas arranged in one direction
intersecting the first direction; a printed circuit board in which
a plurality of board bonding areas arranged in the one direction is
defined and which is electrically connected to the display panel;
and a plurality of flexible circuit boards, each of which includes:
one end disposed on a corresponding one of the panel bonding areas
so as to be connected to the display panel; and another end
disposed on a corresponding one of the board bonding areas so as to
be connected to the printed circuit board, wherein each of at least
two flexible circuit boards disposed at both ends in the one
direction is tilted at a predetermined angle with a flexible
circuit board adjacent thereto.
16. The display device of claim 15, wherein the display device has
a shape curved in a direction surrounding a bending axis parallel
to the first direction.
17. The display device of claim 16, wherein the printed circuit
board is disposed under the display panel.
18. The display device of claim 17, wherein a magnitude of the
predetermined angle is in inverse proportion to a distance between
the display panel and the bending axis.
19. The display device of claim 15, wherein each of at least two
panel bonding areas disposed at both ends among the panel bonding
areas is tilted in such a way that it becomes closer to an end of
the one edge of the display panel in the first direction as a
distance from each side of the display panel in the one direction
decreases.
20. The display device of claim 15, wherein panel bonding areas,
disposed at both ends in the one direction, of the panel bonding
areas are defined as outermost panel bonding areas, wherein board
bonding areas, disposed at both ends in the one direction, of the
board bonding areas are defined as outermost board bonding areas,
and wherein a distance between each of the outermost panel bonding
areas and a panel bonding area adjacent thereto is equal to a
distance between each of the outermost board bonding areas and a
board bonding area adjacent thereto.
21. A display panel comprising: a plurality of pad electrodes
disposed on one edge of the display panel in a first direction and
arranged in a second direction perpendicular to the first
direction, wherein the pad electrodes comprises: a plurality of
first pad electrodes arranged in the second direction; and at least
one second pad electrode disposed at an outermost side of the first
pad electrodes in the second direction, wherein an extending
direction of each of the first pad electrodes is different from an
extending direction of the second pad electrode.
22. A printed circuit board comprising: a plurality of pad
electrodes disposed on one edge of the printed circuit board in a
first direction and arranged in a second direction perpendicular to
the first direction, wherein the pad electrodes comprises: a
plurality of third pad electrodes arranged in the second direction;
and at least one fourth pad electrode disposed at an outermost side
of the third pad electrodes in the second direction, wherein an
extending direction of each of the third pad electrodes is
different from an extending direction of the fourth pad electrode.
Description
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application claims priority under 35 U.S.C. .sctn. 119
to Korean Patent Application No. 10-2017-0153369, filed on Nov. 16,
2017, the disclosure of which is incorporated by reference herein
in its entirety.
TECHNICAL FIELD
[0002] Exemplary embodiments of the present invention relate to a
display device and, more particularly, to a display device
connected to a plurality of flexible circuit boards.
DISCUSSION OF THE RELATED ART
[0003] Low-power and portable display devices are currently under
development to meet desires of increased performance in display
devices. A display device may include a thin film transistor
disposed in each pixel and may turn each pixel on or off by using
the thin film transistor.
[0004] In addition, the display device may include a display panel
and a backlight unit providing light to the display panel. The
backlight unit may include a light source and a light guide plate.
Light generated from the light source may be guided in the light
guide plate toward the display panel.
SUMMARY
[0005] Embodiments of the invention may provide a display device
capable of improving durability and reliability.
[0006] In an aspect of the invention, a display device may include
a display panel that is curved in a direction surrounding an
imaginary bending axis and has a top surface in which a plurality
of panel bonding areas arranged in the curved direction are
defined, a printed circuit board that is curved in the direction
surrounding the bending axis and has a rear surface in which a
plurality of board bonding areas arranged in the curved direction
are defined, and a plurality of flexible circuit boards, each of
which includes one end disposed on a corresponding one of the panel
bonding areas so as to be connected to the display panel, and
another end disposed on a corresponding one of the board bonding
areas so as to be connected to the printed circuit board. At least
one flexible circuit board, disposed at an outermost position, of
the flexible circuit boards may be defined as an outermost flexible
circuit board, and the outermost flexible circuit board may be
tilted at a predetermined angle with the curved direction in such a
way that the one end thereof is tilted with respect to the curved
direction to face an outside of the display panel.
[0007] The printed circuit board may include a first surface in
which the board bonding areas are defined, and a second surface
opposite to the first surface. The printed circuit board may be
disposed under the display panel, and the second surface may be
closer to the display panel than the first surface.
[0008] At least the outermost flexible circuit board of the
flexible circuit boards may be tilted at the predetermined angle
with the curved direction in such a way that the another end
thereof is tilted with respect to the curved direction to face an
inside of the printed circuit board.
[0009] The flexible circuit boards may have the same shape and the
same size.
[0010] The display panel may include a plurality of first pad
electrodes disposed in each of other panel bonding areas of the
panel bonding areas except at least one outermost panel bonding
area, and a second pad electrode disposed in the outermost panel
bonding area. An extending direction of the first pad electrodes
may make the predetermined angle with an extending direction of the
second pad electrode.
[0011] The printed circuit board may include a plurality of third
pad electrodes disposed in each of other board bonding areas of the
board bonding areas except an outermost board bonding area, and a
fourth pad electrode disposed in the outermost board bonding area.
An extending direction of the third pad electrodes may make the
predetermined angle with an extending direction of the fourth pad
electrode.
[0012] A magnitude of the predetermined angle may be in inverse
proportion to a distance between the display panel and the bending
axis.
[0013] The outermost flexible circuit board may be provided in
plurality, and the outermost flexible circuit boards may be
disposed symmetrically with respect to a central axis that is
parallel to the bending axis and passes through a center of the
display device.
[0014] Each of the flexible circuit boards may be tilted in such a
way that the one end thereof is tilted with respect to the curved
direction of the display panel to face the outside of the display
panel and the another end thereof is tilted with respect to the
curved direction of the printed circuit board to face the inside of
the printed circuit board. The angle at which each of the flexible
circuit boards is tilted in the order of being arranged in a
direction from the outermost flexible circuit board toward the
central axis is reduced.
[0015] In an aspect of the invention, a method of manufacturing a
display device may include providing a display panel which has a
flat plate shape and in which a plurality of panel bonding areas
arranged in one direction is defined, providing a printed circuit
board in which a plurality of board bonding areas arranged in the
one direction is defined, connecting the display panel and the
printed circuit board with a plurality of flexible circuit boards,
disposing the printed circuit board under the display panel, and
curving the display panel and the printed circuit board to surround
an imaginary bending axis. The connecting of the display panel and
the printed circuit board may include disposing one end of each of
the flexible circuit boards on a corresponding one of the panel
bonding areas, and disposing another end of each of the flexible
circuit boards on a corresponding one of the board bonding areas.
At least two outermost flexible circuit boards of the flexible
circuit boards may be disposed to be tilted at a predetermined
angle with the one direction in such a way that the one ends
thereof are tilted with respect to the one direction to face an
outside of the display panel and the other ends thereof are tilted
with respect to the one direction to face an inside of the printed
circuit board.
[0016] Areas of the panel bonding areas, on which the one ends of
the outermost flexible circuit boards are disposed, may be defined
as outermost panel bonding areas, and areas of the board bonding
areas, on which the other ends of the outermost flexible circuit
boards are disposed, may be defined as outermost board bonding
areas. In the disposing of the printed circuit board under the
display panel, a distance between each of the outermost panel
bonding areas and a panel bonding area adjacent thereto may be
equal to a distance between each of the outermost board bonding
areas and a board bonding area adjacent thereto.
[0017] The printed circuit board may include a first surface in
which the board bonding areas are defined, and a second surface
opposite to the first surface. The disposing of the printed circuit
board under the display panel may include disposing the printed
circuit board in such a way that the second surface is closer to
the display panel than the first surface.
[0018] The connecting of the display panel and the printed circuit
board may include disposing the flexible circuit boards
symmetrically with respect to a central axis that is parallel to
the bending axis and passes through a center of the display
device.
[0019] The connecting of the display panel and the printed circuit
board may further include tilting the flexible circuit boards in
such a way that the one ends of the flexible circuit boards are
tilted to face the outside of the display panel and the other ends
of the flexible circuit boards are tilted to face the inside of the
printed circuit board. Tilted angles of the flexible circuit boards
may sequentially decrease in a direction toward the central
axis.
[0020] In an aspect of the invention, a display device may include
a display panel displaying an image and including a pad area
defined in one edge of the display panel in a first direction, the
pad area including a plurality of panel bonding areas arranged in
one direction intersecting the first direction, a printed circuit
board in which a plurality of board bonding areas arranged in the
one direction is defined and which is electrically connected to the
display panel, and a plurality of flexible circuit boards, each of
which includes one end disposed on a corresponding one of the panel
bonding areas so as to be connected to the display panel, and
another end disposed on a corresponding one of the board bonding
areas so as to be connected to the printed circuit board. Each of
at least two flexible circuit boards disposed at both ends in the
one direction is tilted at a predetermined angle with a flexible
circuit board adjacent thereto.
[0021] The display device may have a shape curved in a direction
surrounding a bending axis parallel to the first direction.
[0022] The printed circuit board may be disposed under the display
panel.
[0023] A magnitude of the predetermined angle may be in inverse
proportion to a distance between the display panel and the bending
axis.
[0024] Each of at least two panel bonding areas disposed at both
ends among the panel bonding areas may be tilted in such a way that
it becomes closer to an end of the one edge of the display panel in
the first direction as a distance from each side of the display
panel in the one direction decreases.
[0025] Panel bonding areas, disposed at both ends in the one
direction, of the panel bonding areas may be defined as outermost
panel bonding areas, and board bonding areas, disposed at both ends
in the one direction, of the board bonding areas may be defined as
outermost board bonding areas. A distance between each of the
outermost panel bonding areas and a panel bonding area adjacent
thereto may be equal to a distance between each of the outermost
board bonding areas and a board bonding area adjacent thereto.
[0026] In an aspect of the invention, a display panel may include a
plurality of pad electrodes disposed on one edge of the display
panel in a first direction and arranged in a second direction
perpendicular to the first direction. The pad electrodes may
include a plurality of first pad electrodes arranged in the second
direction, and at least one second pad electrode disposed at an
outermost side of the first pad electrodes in the second direction.
An extending direction of each of the first pad electrodes may be
different from an extending direction of the second pad
electrode.
[0027] In an aspect, a printed circuit board may include a
plurality of pad electrodes disposed on one edge of the printed
circuit board in a first direction and arranged in a second
direction perpendicular to the first direction. The pad electrodes
may include a plurality of third pad electrodes arranged in the
second direction, and at least one fourth pad electrode disposed at
an outermost side of the third pad electrodes in the second
direction. An extending direction of each of the third pad
electrodes may be different from an extending direction of the
fourth pad electrode.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The above and other features of the present invention will
become more apparent by describing in further detail exemplary
embodiments thereof with reference to the accompanying drawings, in
which:
[0029] FIG. 1 is an exploded perspective view illustrating a
display device according to an exemplary embodiment of the present
invention;
[0030] FIG. 2 is a perspective view illustrating a display module
of FIG. 1 according to an exemplary embodiment of the present
invention;
[0031] FIG. 3 is an enlarged view illustrating a bonding portion of
a display panel and a printed circuit board according to an
exemplary embodiment of the present invention;
[0032] FIG. 4 is an enlarged view of an area `A` of FIG. 3
according to an exemplary embodiment of the present invention;
[0033] FIGS. 5A and 5B are cross-sectional views illustrating a
display module according to an exemplary embodiment of the present
invention;
[0034] FIGS. 6A and 6B are schematic views illustrating outermost
flexible circuit boards when a display module is bent according to
an exemplary embodiment of the present invention; and
[0035] FIG. 7 is an enlarged view illustrating a bonding portion of
a display panel and a printed circuit board according to an
exemplary embodiment of the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0036] Exemplary embodiments of the present invention will be
described more fully hereinafter with reference to the accompanying
drawings. It is to be understood that the present invention may,
however, be embodied in many different forms, and thus should not
be construed as being limited to the exemplary embodiments set
forth herein. In the figures, like reference numerals refer to like
elements throughout.
[0037] It will be understood that when an element such as a layer,
region or substrate is referred to as being "on" another element,
the element may be directly on the other element or intervening
elements.
[0038] In the drawings, sizes and thicknesses of layers and regions
may be exaggerated for clarity. In addition, variations from the
shapes, which are illustrated in the following figures, as a
result, for example, of manufacturing techniques and/or tolerances,
are to be expected. Thus, exemplary embodiments of the present
invention should not be construed as limited to the shapes of
regions illustrated herein but are to include deviations in shapes
that result, for example, from manufacturing. For example, an
etching region illustrated as a rectangle may, typically, have
rounded or curved features.
[0039] FIG. 1 is an exploded perspective view illustrating a
display device according to an exemplary embodiment of the present
invention, and FIG. 2 is a perspective view illustrating a display
module of FIG. 1 according to an exemplary embodiment of the
present invention. For the purpose of ease and convenience in the
description, FIG. 2 illustrates a display module DM in an unbent or
flat configuration.
[0040] Referring to FIGS. 1 and 2, a display device 1000 according
to an exemplary embodiment of the present invention may have a
rectangular shape that has short sides in a first direction DR1 and
long sides in a second direction DR2. However, the present
invention is not limited thereto. For example, the shape of the
display device 1000 may have sides that are all equal in length or
just two sides equal in length.
[0041] In the present embodiment, in the display device 1000, a
direction in which an image is provided is an upward direction and
a direction opposite to the upward direction is a downward
direction. In the present embodiment, the upward and downward
directions are parallel to a third direction DR3 perpendicular to
the first direction DR1 and the second direction DR2. The third
direction DR3 may be a reference direction that is used to indicate
a front surface and a rear surface of each component described
below. However, the upward and downward directions may be may be
changed into other directions.
[0042] The display device 1000 may have a shape that is convexly
bent in the downward direction from a plane indicated by the first
and second directions DR1 and DR2. For example, the display device
1000 may be bent or curved in a concave direction toward the third
direction DR3 with reference to a bending axis BX extending in the
first direction DR1. Hereinafter, the concave direction BD is
referred to as a bending direction BD. Therefore, the display
device 1000 may have a straight line in the first direction DR1 and
may have a curved line in a plane corresponding to the second and
third directions DR2 and DR3.
[0043] The display device 1000 may include a display module DM, a
backlight unit BLU, and a receiving member BC.
[0044] The display module DM may include a display panel DP, a
printed circuit board PCB, and a plurality of flexible circuit
boards FPCB.
[0045] The display panel DP may include at least one display
surface for display an image. For example, one surface of the
display panel includes a display area DA that displays an image and
a non-display area NDA that does not display an image. In other
words, the display panel DP may display an image through a
concavely formed (e.g., curved or bent) display surface to provide
a sense of immersion (or immersiveness) to a user.
[0046] The display area DA may be a central portion of the display
surface of the display panel DP, and the non-display area NDA may
have a frame shape surrounding the display area DA. However,
exemplary embodiments of the present invention are not limited
thereto. For example, a plurality of the display areas DA may be
provided in the display surface of the display panel DP, and/or the
non-display area NDA may be provided in only one or some edges of
the display surface. In other words, the non-display area NDA may
partially surround the display area DA.
[0047] In an exemplary embodiment of the present invention, a kind
of the display panel DP used is not limited to a specific kind. For
example, the display panel DP may be a liquid crystal display
panel, an organic electro luminescence display panel, an
electrowetting display panel, or a nano-crystal display panel. When
the display panel DP is the organic electro luminescence display
panel, the backlight unit BLU may be omitted in the display device
1000 since the organic electro luminescence display panel generates
light by itself to display an image. Hereinafter, the liquid
crystal display panel will be described as an example of the
display panel DP in exemplary embodiments of the present
invention.
[0048] The display panel DP may include a first substrate 110, a
second substrate 120 facing the first substrate 110, and a liquid
crystal layer disposed between the first substrate 110 and the
second substrate 120.
[0049] The non-display area NDA may include a pad area PDA. The pad
area PDA may be disposed on the first substrate 110. In the present
embodiment, the pad area PDA may be disposed in one edge of the
first substrate 110 extending in the first direction DR1 from the
second substrate 120. For example, the one edge, in which the pad
area PDA is disposed, may be exposed by the second substrate
120.
[0050] For example, in the present embodiment, a short side of the
first substrate 110 may be longer than a short side of the second
substrate 120. In other words, a size of the first substrate 110
may be greater than a size of the second substrate 120, and a
portion of the first substrate 110 may be exposed by the second
substrate 120. Another edge of the first substrate 110 in the first
direction DR1 may be covered by the second substrate 120. In other
words, a remaining portion of the first substrate 110 except the
one edge of the first substrate 110, exposed by the second
substrate 120, may overlap with the second substrate 120. An area
in which the first and second substrates 110 and 120 overlap with
each other may include the display area DA. The pad area PDA may be
provided in an area in which the first and second substrates 110
and 120 do not overlap with each other.
[0051] The printed circuit board PCB may extend along the long side
of the display device 1000. The printed circuit board PCB may have
a shape that is convexly bent in the downward direction from the
plane defined by the first and second directions DR1 and DR2. The
printed circuit board PCB may be disposed under the display panel
DP to overlap with one edge of the display panel DP in the third
direction DR3. For example, the printed circuit board PCB may
overlap with the pad area PDA, which extends in the first direction
DR1 from the second substrate 120.
[0052] The printed circuit board PCB may include a first surface S1
and a second surface S2 opposite to the first surface S1 in the
third direction DR3. The printed circuit board PCB may be disposed
under the display panel DP in such a way that the second surface S2
is closer to the display panel DP than the first surface S1. For
example, the first surface S1 may be a bottom surface (e.g., rear
surface) and the second surface S2 may be a top surface.
[0053] The flexible circuit boards FPCB may electrically connect
the display panel DP and the printed circuit board PCB to each
other. The flexible circuit boards FPCB may be flexible and may be
bent so that the printed circuit board PCB may be disposed under
the display panel DP. In the present embodiment, the flexible
circuit boards FPCB may be provided in the form of a tape carrier
package (TCP).
[0054] For example, one end of each of the flexible circuit boards
FPCB may be connected to the pad area PDA of the display panel DP,
and another end of each of the flexible circuit boards FPCB may be
connected to the printed circuit board PCB.
[0055] According to the present embodiment, the display panel DP
and the printed circuit board PCB may be connected to each other by
the flexible circuit boards FPCB, and then, the flexible circuit
boards FPCB may be bent downward so that the printed circuit board
PCB may be disposed under the display panel DP. In addition, in an
exemplary embodiment of the present invention, the printed circuit
board PCB may be disposed under the display panel DP, and then, the
display panel DP and the printed circuit board PCB may be connected
to each other by the flexible circuit boards FPCB.
[0056] The display module DM will be described later with reference
to FIGS. 3 to 6B.
[0057] The backlight unit BLU may provide light to the display
panel DP and may be disposed under the display panel DP. The
backlight unit BLU may include a light source LS, a light guide
plate LGP, optical sheets OPS, and a reflective sheet RS.
[0058] The light source LS may generate light. In an exemplary
embodiment of the present invention, the backlight unit BLU may be
a direct type backlight unit. However, exemplary embodiments of the
present invention are not limited thereto.
[0059] The light source LS may include a plurality of light source
units LSU and a plurality of light source substrates LSS. Each of
the light source substrates LSS may have a rectangular plate shape
extending in the first direction DR1. The light source substrates
LSS may be arranged in the second direction DR2. However, exemplary
embodiments of the present invention are not limited to the number,
the extending direction, the arrangement direction and the shapes
of the light source substrates LSS.
[0060] The light source units LSU may be mounted on each of the
light source substrates LSS. The light source units LSU may be
arranged in the extending direction of each of the light source
substrates LSS. For example, the light source units LSU may be
arranged in the first direction DR1.
[0061] The light guide plate LGP may be disposed over the light
source LS. The light guide plate LGP may have a shape that is
convexly bent in the downward direction parallel to the third
direction DR3.
[0062] The light guide plate LGP may receive light from the light
source LS and may guide the received light toward the display panel
DP. The light guide plate LGP may include a material that has a
high light transmittance in a visible light band. The light guide
plate LGP may be formed of at least one of, but not limited to,
polyamide (PA), polymethyl methacrylate (PMMA), methyl
methacrylate-styrene (MS), or polycarbonate (PC). In an exemplary
embodiment of the present invention, the light guide plate LGP may
be omitted.
[0063] The optical sheets OPS may be disposed between the light
guide plate LGP and the display panel DP. The optical sheets OPS
may control a path of the light guided from the light guide plate
LGP. The optical sheets OPS may have shapes that are convexly bent
in the downward direction.
[0064] The optical sheets OPS may include a diffusion sheet SH1, a
prism sheet SH2, and a protective sheet SH3. The diffusion sheet
SH1 may diffuse light. The prism sheet SH2 may condense the light
diffused by the diffusion sheet SH1 in such a way that traveling
directions of the diffused light become closer to a normal
direction of the display panel DP (e.g., a perpendicular to the
display panel DP). The protective sheet SH3 may protect the prism
sheet SH2 from an external impact. In the present embodiment, the
optical sheets OPS include one diffusion sheet SH1, one prism sheet
SH2, and one protective sheet SH3. However, exemplary embodiments
of the present invention are not limited thereto. In an exemplary
embodiment of the present invention, at least one of the diffusion
sheet SH1, the prism sheet SH2 or the protective sheet SH3 may be
provided in plurality, or one or more of the diffusion sheet SH1,
the prism sheet SH2 and the protective sheet SH3 may be
omitted.
[0065] The reflective sheet RS may be disposed between the light
source LS and the light guide plate LGP. The reflective sheet RS
may have a shape that is convexly bent in the downward
direction.
[0066] The reflective sheet RS may reflect light leaked from the
light guide plate LGP to provide the leaked light to the light
guide plate LGP. The reflective sheet RS may include a plurality of
holes H. The light source units LSU may be inserted in the holes
H.
[0067] The backlight unit BLU according to an exemplary embodiment
of the present invention may include a mold frame MF. The mold
frame MF may be provided along edges of the display panel DP to
support the display panel DP from beneath it. In other words, the
mold frame MF may have a ring shape or a rectangular shape with an
opening in the center thereof. In addition, the mold frame MF may
support the optical sheets OPS disposed under the display panel
DP.
[0068] The receiving member BC may be disposed at a bottom of the
display device 1000 to receive the display panel DP and the
backlight unit BLU. The receiving member BC may have a shape that
is convexly bent in the downward direction. The light source LS may
be disposed on a bottom portion of the receiving member BC. The
receiving member BC may be made of a metal material.
[0069] The display device 1000 according to an exemplary embodiment
of the present invention may further include a protective member
TC. The protective member TC may be disposed above the display
device 1000. The protective member TC may have a shape that is
convexly bent in the downward direction. The protective member TC
may have a frame shape extending along the edges of the display
panel DP. In other words, an opening OP in the protective member TC
may overlap the display area DA and the protective member TC may
surround the display panel DP. The display area DA of the display
panel DP may be exposed through the opening OP. In an exemplary
embodiment of the present invention, the protective member TC may
be omitted.
[0070] In the present embodiment, the display panel DP and the
printed circuit board PCB connected to each other by the flexible
circuit boards FPCB may have shapes which are curved along the
bending axis BX. The display panel DP and the printed circuit board
PCB may be curved by external pressure. For example, when the
display device 1000 is assembled, the display panel DP and the
printed circuit board PCB may be provided in a curved state by the
curved shapes of the protective member TC, the receiving member BC
and the mold frame MF which may have a high hardness or
rigidity.
[0071] FIG. 3 is an enlarged view illustrating a bonding portion of
a display panel and a printed circuit board according to an
exemplary embodiment of the present invention. FIG. 4 is an
enlarged view of an area `A` of FIG. 3 according to an exemplary
embodiment of the present invention. For the purpose of ease and
convenience in description, FIGS. 2 to 4 illustrate the display
module DM in a flat, unbent, or un-curved configuration. For
example, in FIG. 2, the printed circuit board PCB is disposed
adjacent to the display panel DP and the flexible circuit boards
FPCB are stretched out. In addition, for the purpose of ease and
convenience in description, the first surface S1 of the printed
circuit board PCB is illustrated in FIGS. 3 and 4.
[0072] Referring to FIGS. 2 to 4, the pad area PDA of the display
panel DP may include a plurality of panel bonding areas PBA1 to
PBA3. The panel bonding areas PBA1 to PBA3 may be arranged in the
second direction DR2 in a plane parallel to the first and second
directions DR1 and DR2.
[0073] The panel bonding areas PBA1 to PBA3 may be arranged in the
second direction DR2 before the display panel DP is curved from a
flat configuration. However, after the assembly of the display
device 1000 is completed, the panel bonding areas PBA1 to PBA3 of
the curved display panel DP may be arranged in the bending
direction BD (see FIG. 1). The panel bonding areas PBA1 to PBA3,
after the display panel DP, is curved will be described later.
[0074] The panel bonding areas PBA1 to PBA3 may be arranged
symmetrically with respect to a central axis CX that is parallel to
the bending axis BX and passes through a center of the display
device 1000. In other words, the number of panel bonding areas PBA1
to PBA3 on one side of the central axis CX is the same as the
number of panel bonding areas PBA1 to PBA3 on the other side of the
central axis CX.
[0075] For example, the panel bonding areas PBA1 to PBA3 may
include first panel bonding areas PBA1, second panel bonding areas
PBA2, and third panel bonding areas PBA3. One first panel bonding
area PBA1, one second panel bonding area PBA2 and one third panel
bonding area PBA3 may be disposed in the pad area PDA at each side
of the central axis CX.
[0076] Six panel bonding areas PBA1 to PBA3 are illustrated in
FIGS. 2 and 3. However, exemplary embodiments of the of the present
invention are not limited to the number of the panel bonding areas
PBA1 to PBA3. In an exemplary embodiment of the present invention,
even though not shown in the drawings, an odd number of the panel
bonding areas may be provided. In this case, a panel bonding area
disposed at a center may overlap with the central axis CX, and the
other panel bonding areas may be arranged symmetrically with
respect to the panel bonding area disposed at the center.
[0077] The first, second and third panel bonding areas PBA1, PBA2
and PBA3 disposed at each side of the central axis CX may be
sequentially arranged in a direction away from the central axis CX.
For example, the first panel bonding areas PBA1 may be disposed
closer to the central axis CX than the second panel bonding areas
PBA2. The second panel bonding areas PBA2 may be disposed closer to
the central axis CX than the third panel bonding areas PBA3. In
other words, the third panel bonding areas PBA3 may correspond to
the outermost panel bonding areas of the panel bonding areas PBA1
to PBA3 in the second direction DR2. Hereinafter, the third panel
bonding areas PBA3 are the outermost panel bonding areas.
[0078] In the present embodiment, each of the panel bonding areas
PBA1 to PBA3 may have a rectangular shape. For example, in the
present embodiment, each of the first panel bonding areas PBA1 and
the second panel bonding areas PBA2 may have a rectangular shape
having a long side parallel to the second direction DR2. However,
exemplary embodiments of the present invention are not limited to
the shapes of the panel bonding areas PBA1 to PBA3.
[0079] Each of the outermost panel bonding areas PBA3 may be tilted
with respect to the second direction DR2 to face the outside of the
display panel DP. In other words, each of the outermost panel
bonding areas PBA3 may be tilted in such a way that it becomes
closer to an end of the one edge of the display panel DP in the
first direction DR1 as a distance in the second direction DR2 from
each short side of the display panel DP decreases.
[0080] Each of the outermost panel bonding areas PBA3 may be tilted
at a predetermined angle .theta. with respect to the second
direction DR2. In other words, each of the outermost panel bonding
areas PBA3 may have a rectangular shape having a long side tilted
at the predetermined angle .theta. with respect to the second
direction DR2. The outermost panel bonding areas PBA3 may be tilted
symmetrically with respect to the central axis CX.
[0081] In the present embodiment, two outermost panel bonding areas
PBA3 are disposed on the display panel DP. However, exemplary
embodiments of the present invention are not limited to the number
of the outermost panel bonding areas PBA3. For example, in an
exemplary embodiment of the present invention, one outermost panel
bonding area may be disposed at one of two ends of the panel
bonding areas PBA1 to PBA3.
[0082] The display panel DP may include a plurality of pad
electrodes P1 or P2 disposed in each of the panel bonding areas
PBA1 to PBA3 and arranged in a long side direction of each of the
panel bonding areas PBA1 to PBA3.
[0083] First pad electrodes P1 may be disposed in each of the first
and second panel bonding areas PBA1 and PBA2. The first pad
electrodes P1 may extend in the first direction DR1. Second pad
electrodes P2 may be disposed in each of the outermost panel
bonding areas PBA3. The second pad electrodes P2 may make the
predetermined angle .theta. with respect to the first pad
electrodes P1. However, exemplary embodiments of the present
invention are not limited to the extending directions and the
shapes of the pad electrodes P1 and P2.
[0084] The printed circuit board PCB may include a plurality of
board bonding areas BBA1 to BBA3 defined in the first surface S1 of
the printed circuit board PCB. The board bonding areas BBA1 to BBA3
may be arranged in the second direction DR2 in a plane parallel to
the first and second directions DR1 and DR2.
[0085] The board bonding areas BBA1 to BBA3 may be arranged in the
second direction DR2 before the printed circuit board PCB is curved
from a flat configuration. However, after the assembly of the
display device 1000 is completed, the board bonding areas BBA1 to
BBA3 of the curved printed circuit board PCB may be arranged in the
bending direction BD (see FIG. 1). The board bonding areas BBA1 to
BBA3, after the printed circuit board PCB is curved, will be
described later.
[0086] The board bonding areas BBA1 to BBA3 may be arranged
symmetrically with respect to the central axis CX that is parallel
to the bending axis BX and passes through the center of the display
device 1000. In other words, the number of board bonding areas BBA1
to BBA3 on one side of the central axis CX is the same as the
number of board bonding areas BBA1 to BBA3 on the other side of the
central axis CX.
[0087] For example, the board bonding areas BBA1 to BBA3 may
include first board bonding areas BBA1, second board bonding areas
BBA2, and third board bonding areas BBA3. One first board bonding
area BBA, one second board bonding area BBA2 and one third board
bonding area BBA3 may be disposed in the printed circuit board PCB
at each side of the central axis CX. The board bonding areas BBA1
to BBA3 may correspond one-to-one to the panel bonding areas PBA1
to PBA3.
[0088] Six board bonding areas BBA1 to BBA3 are illustrated in
FIGS. 2 and 3. However, exemplary embodiments of the present
invention are not limited to the number of the board bonding areas
BBA1 to BBA3. In an exemplary embodiment of the present invention,
an odd number of the board bonding areas may be disposed in the
printed circuit board PCB. In this case, a board bonding area
disposed at a center may overlap with the central axis CX, and the
other board bonding areas may be arranged symmetrically with
respect to the board bonding area disposed at the center.
[0089] The first, second and third board bonding areas BBA1, BBA2
and BBA3 disposed at each side of the central axis CX may be
sequentially arranged in a direction away from the central axis CX.
For example, the first board bonding areas BBA1 may be disposed
closer to the central axis CX than the second board bonding areas
BBA2. The second board bonding areas BBA2 may be disposed closer to
the central axis CX than the third board bonding areas BBA3. In
other words, the third board bonding areas BBA3 may correspond to
the outermost board bonding areas of the board bonding areas BBA1
to BBA3 in the second direction DR2. Hereinafter, the third board
bonding areas BBA3 are the outermost board bonding areas.
[0090] In the present embodiment, each of the board bonding areas
BBA1 to BBA3 may have a rectangular shape. For example, in the
present embodiment, each of the first board bonding areas BBA1 and
the second board bonding areas BBA2 may have a rectangular shape
having a long side parallel to the second direction DR2. However,
exemplary embodiments of the present invention are not limited to
the shapes of the board bonding areas BBA1 to BBA3. For example,
the board bonding areas BBA1 to BBA3 may have square or rounded
shape.
[0091] Each of the outermost board bonding areas BBA3 may be tilted
with respect to the second direction DR2 to face the inside of the
printed circuit board PCB. In other words, each of the outermost
board bonding areas BBA3 may be tilted in such a way that it
becomes closer to a side, connected to the display panel DP, of
sides of the printed circuit board PCB facing each other in the
first direction DR1 as a distance between the central axis CX and
the outermost board bonding areas BBA3 on the first surface S1
decreases.
[0092] The printed circuit board PCB may include a plurality of pad
electrodes P3 or P4 disposed in each of the board bonding areas
BBA1 to BBA3 and arranged in a long side direction of each of the
board bonding areas BBA1 to BBA3. For example, the pad electrode P3
or P4 are arranged in the second direction DR2.
[0093] Third pad electrodes P3 may be disposed in each of the first
and second board bonding areas BBA1 and BBA2. The third pad
electrodes P3 may extend in the first direction DR1. Fourth pad
electrodes P4 may be disposed in each of the outermost board
bonding areas BBA3. The fourth pad electrodes P4 may make the
predetermined angle .theta. with the third pad electrodes P3.
However, exemplary embodiments of the present invention are not
limited to the extending directions and the shapes of the pad
electrodes P3 and P4.
[0094] The flexible circuit boards FPCB may electrically connect
the display panel DP and the printed circuit board PCB to each
other. The flexible circuit boards FPCB (TP1 to TP3) may be
arranged in the second direction DR2. For example, flexible circuit
boards FPCB (TP1 to TP3) may be arranged symmetrically with respect
to the central axis CX in the second direction DR2.
[0095] The flexible circuit boards FPCB may be arranged in the
second direction DR2 before the display module DM is formed into a
curved configuration. However, after the assembly of the display
device 1000 is completed, the flexible circuit boards FPCB of the
curved display module DM may be arranged in the bending direction
BD (see FIG. 1). The flexible circuit boards FPCB after the display
module DM is curved will be described later.
[0096] The flexible circuit boards FPCB may be provided to
correspond to the number of the panel bonding areas PBA1 to PBA3
provided on the display panel DP and the number of the board
bonding areas BBA1 to BBA3 provided on the printed circuit board
PCB. For example, the flexible circuit boards FPCB may include
first flexible circuit boards TP1, second flexible circuit boards
TP2, and third flexible circuit boards TP3. One first flexible
circuit board TP1, one second flexible circuit board TP2 and one
third flexible circuit board TP3 may be disposed at each side of
the central axis CX.
[0097] The first, second and third flexible circuit boards TP1, TP2
and TP3 disposed at each side of the central axis CX may be
sequentially arranged in a direction away from the central axis CX.
The first flexible circuit boards TP1 may be disposed closer to the
central axis CX than the second flexible circuit boards TP2. The
second flexible circuit boards TP2 may be disposed closer to the
central axis CX than the third flexible circuit boards TP3. In
other words, the third flexible circuit boards TP3 may be the
outermost flexible circuit boards of the flexible circuit boards
TP1 to TP3 arranged in the second direction DR2. Hereinafter, the
third flexible circuit boards TP3 is the outermost flexible circuit
boards TP3.
[0098] In the present embodiment, the flexible circuit boards TP1
to TP3 may have substantially the same shape and substantially the
same size. For example, the flexible circuit boards TP1 to TP3 may
have rectangular shapes. However, exemplary embodiments of the
present invention are not limited thereto. For example, the
flexible circuit boards TP1 to TP3 may have a square shape.
[0099] The flexible circuit boards TP1 to TP3 may correspond to the
panel bonding areas PBA1 to PBA3 and the board bonding areas BBA1
to BBA3, respectively. One end of each of the flexible circuit
boards TP1 to TP3 may be disposed on a corresponding one of the
panel bonding areas PBA1 to PBA3 to be connected to the display
panel DP, and another end of each of the flexible circuit boards
TP1 to TP3 may be disposed on a corresponding one of the board
bonding areas BBA1 to BBA3 to be connected to the printed circuit
board PCB.
[0100] For example, the first and second flexible circuit boards
TP1 and TP2 may extend in parallel to the first direction DR1 to
electrically connect the display panel DP and the printed circuit
board PCB.
[0101] Each of the outermost flexible circuit boards TP3 may be
tilted at the predetermined angle .theta. with the second direction
DR2 in such a way that the one end thereof is tilted with respect
to the second direction DR2 to face the outside of the display
panel DP. In other words, each of the outermost flexible circuit
boards TP3 may be tilted at the predetermined angle .theta. in such
a way that the other end thereof faces the inside of the printed
circuit board PCB. In the present embodiment, the predetermined
angle .theta. may be in inverse proportion to a radius of curvature
of the curved display module DM. In other words, the predetermined
angle .theta. may be in inverse proportion to a distance between
the display module DM and the imaginary bending axis BX (see FIG.
1).
[0102] Since the one end and the other end of each of the flexible
circuit boards TP1 to TP3 are disposed on the corresponding one of
the panel bonding areas PBA1 to PBA3 and the corresponding one of
the board bonding areas BBA1 to BBA3, respectively, the display
panel DP may be electrically connected to the printed circuit board
PCB. In other words, the third pad electrodes P3 may be
electrically connected to the first pad electrodes P1 through the
flexible circuit boards TP1 and TP2, and the fourth pad electrodes
P4 may be electrically connected to the second pad electrodes P2
through the outermost flexible circuit boards TP3.
[0103] FIGS. 5A and 5B are cross-sectional views illustrating a
display module according to an exemplary embodiment of the present
invention, and FIGS. 6A and 6B are schematic views illustrating
outermost flexible circuit boards when a display module is bent
according to an exemplary embodiment of the present invention. For
example, FIG. 5A illustrates a state before the display module DM
is curved (e.g., when the display module DM is in a flat state),
and FIG. 5B illustrates a state after the display module DM is
curved. The flexible circuit boards FPCB are omitted in FIGS. 5A
and 5B for the purpose of ease and convenience in description and
illustration. In addition, FIGS. 6A and 6B illustrate a position of
the display panel with respect to the printed circuit board when
the display module DM is curved.
[0104] As illustrated in FIG. 5A, before the display module DM is
curved, the panel bonding areas PBA1 to PBA3 may overlap with the
board bonding areas BBA1 to BBA3 when viewed from a cross-sectional
view.
[0105] In addition, before the display module DM is curved, a
distance between the outermost panel bonding area PBA3 and the
second panel bonding area PBA2 may be equal to a distance between
the outermost board bonding area BBA3 and the second board bonding
area BBA2. For example, a radius of curvature of the printed
circuit board PCB may correspond to a radius of curvature of the
display panel DP.
[0106] Referring to FIGS. 5B, 6A and 6B, the display module DM may
be curved in the bending direction BD by external pressure. Since
the display module DM is curved, the display panel DP may be moved
away from the printed circuit board PCB. For example, since the
display module DM is curved, a separation distance between a point
in the panel bonding areas PBA1 to PBA3 and a corresponding point
in the board bonding areas BBA1 to BBA3 may increase.
[0107] An increasing rate of the separation distance may increase
as a distance from the central axis CX (see FIG. 2) increases. In
addition, the increasing rate of the separation distance may be in
inverse proportion to the distance between the display module DM
and the bending axis BX (see FIG. 1).
[0108] Unlike the embodiment of the invention, if all the flexible
circuit boards FPCB are disposed in parallel to each other (e.g.,
the outermost panel bonding areas PBA3 are parallel to the second
direction DR2 and the outermost board bonding areas BBA3 are
parallel to the second direction DR2), stress may occur at the
flexible circuit boards FPCB by the increase in the separation
distance which is caused by the curving of the display module DM.
Therefore, damage may occur at the outermost flexible circuit
boards TP3 having the highest increasing rate of the separation
distance, and/or the connection between the display panel DP and
the printed circuit board PCB may be broken. However, according to
an exemplary embodiment of the present invention, since the
outermost flexible circuit boards TP3 are tilted with respect to
the second direction DR2 to face the outside of the display panel
DP, the increase in the separation distance by the curving of the
display module DM may be compensated. In other words, the
connection between the display panel DP and the printed circuit
board PCB may be prevented from being broken.
[0109] As a result, according to an exemplary embodiment of the
present invention, durability of the display device 1000 may be
increased.
[0110] FIG. 7 is an enlarged view illustrating a bonding portion of
a display panel and a printed circuit board according to an
exemplary embodiment of the present invention.
[0111] For the purpose of ease and convenience in description,
differences between the present embodiment and the above exemplary
embodiments of the present invention will be mainly described and
the same descriptions as in the above exemplary embodiments of the
present invention may be omitted. In addition, the same components
as described above may be indicated by the same reference
designators, and the descriptions thereto may be omitted or
mentioned briefly.
[0112] As illustrated in FIG. 7, according to an exemplary
embodiment of the present invention, one first panel bonding area
PBA1-1, one second panel bonding area PBA2-1 and one third panel
bonding area PBA3-1 may be disposed in the pad area PDA at each
side of the central axis CX.
[0113] In addition, one first board bonding area BBA1-1, one second
board bonding area BBA2-1 and one third board bonding area BBA3-1
may be disposed in the printed circuit board PCB at each side of
the central axis CX. The board bonding areas BBA1-1 to BBA3-1 may
correspond one-to-one to the panel bonding areas PBA1-1 to
PBA3-1.
[0114] According to the present embodiment, tilted angles of the
panel bonding areas PBA1-1 to PBA3-1 and tilted angles of the board
bonding areas BBA1-1 to BBA3-1 may sequentially decrease in a
direction toward the central axis CX.
[0115] For example, the first panel bonding areas PBA1-1 and the
first board bonding areas BBA1-1 may be tilted at a first angle
.theta.1 with respect to the second direction DR2. The second panel
bonding areas PBA2-1 and the second board bonding areas BBA2-1 may
be tilted at a second angle .theta.2 with respect to the second
direction DR2. The third panel bonding areas PBA3-1 and the third
board bonding areas BBA3-1 may be tilted at a third angle .theta.3
with respect to the second direction DR2. A magnitude of the second
angle .theta.2 may be greater than a magnitude of the first angle
.theta.1. A magnitude of the third angle .theta.3 may be greater
than a magnitude of the second angle .theta.2. For example, tilted
angles of the flexible circuit boards disposed at each side of the
central axis CX may sequentially decrease in a direction from the
outermost flexible circuit board disposed at each side of the
central axis CX toward the central axis CX. The tilted angle may be
in proportion to the separation distance described above.
[0116] In an exemplary embodiment of the present invention, the
third panel bonding areas PBA3-1 and the third board bonding areas
BBA3-1 may be titled at the third angle .theta.3. The second panel
bonding areas PBA2-1 and the second board bonding areas BBA2-1 may
be titled at the second angle .theta.2, but the first panel bonding
areas PBA1-1 and the first board bonding areas BBA1-1 may not be
tilted at a predetermined angle. However, the present invention is
not limited thereto.
[0117] According to exemplary embodiments of the present invention,
the durability and reliability of the display device may be
increased.
[0118] While the present invention has been described with
reference to exemplary embodiments thereof, it will be understood
by those of ordinary skill in the art that various changes in form
and details may be made thereto without departing from the spirit
and scope of the present invention as defined by the following
claims.
* * * * *